Use the Yes-No MessageBox dialog to display a dialog that prompts a user to select Yes or No.
    To display this dialog box:
Click Add in the Edit Action dialog box, then choose Yes-No MessageBox  and click OK.
The Yes-No message box displays for the user who triggers the action. The value the user selects is stored in a Dispatch runtime variable you specify.
| Prompt string | Supplies the prompt string for the message box.  You can include dynamic Dispatch variable names ( %variable%) in the prompt string, for example,Do you wish to publish %PathToSelectedFile%? | 
| Variable name | Specifies a runtime variable to contain the value selected from the Yes-No message box.  Select an existing runtime variable from the dropdown list or click  to define a new runtime variable. | 
| YES value | This value is stored in the defined runtime variable if the user selects Yes. | 
| NO value | This value is stored in the defined runtime variable if the user selects No. |